Microfluidics and sunlight combined to purify water

It has been known for some time now that sunlight can be used to purify drinking water. The practice of Solar Water Disinfection (SODIS) basically involves just leaving water sitting in direct sunlight, where a combination of heat and UV rays kill off waterborne pathogens – the process is called photocatalysis, and it’s what’s at work behind both the Solaqua water purification device, and a system recently created by students from the University of Washington. Now, researchers from Hong Kong Polytechnic University have taken things a step further, by combining photocatalysis with microfluidics in a microreactor.

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